A firefighter was injured while battling an attic fire Saturday evening in north suburban Lake Forest.

Crews responded to the home near Everett and Waukegan roads about 5 p.m. and found a moderate amount of smoke coming from the attic, according to Lake Forest Fire Department Battalion Chief Mike Gallo.

They were able to prevent the fire from spreading, and the blaze was extinguished within about 45 minutes.

One firefighter suffered a minor injury. No other injuries were reported and damages were estimated at about $50,000. The cause of the fire remains under investigation.

Firefighters found smoke showing from the attic space of a raised ranch home, and investigators think the house was struck by lightning. The attic fire resulted in $50,000 damage and one firefighter being sent to the hospital with a knee injury.

The fire was contained to the attic but took about an hour to put out because firefighters had to clean out some tight spaces.

The Wauconda Fire District was assisted by departments from Lake Villa, Round Lake, Barrington Countryside, Fox River Grove, Cary and Grayslake.